POTABLE WATER SUPPLY PIPELINE PRODUCTS GIBAULT COUPLING WITH BOLTS   GIBAULT COUPLING WITH BOLTS   Use For the connection of potable water supply asbestos cement pipes. Material of manufacture   Metal parts are made of Ductile Iron EN-GJS-400-15 according to standard UNI EN 1563.     The rubber O-RING is made of material EPDM suitable for use in potable water.     The bolts, the nuts and the washers are made of stainless steel AISI 304 EN 1,4301. Surfarce paint   Blue colour FUSION BOND EPOXY paint with thickness externally 250 μm and internally 150 μm.